RM0090: Reference manual - STMicroelectronics

Basic timers (TIM6&TIM7) RM0090
17 Basic timers (TIM6&TIM7)
This section applies to the whole STM32F4xx family, unless otherwise specified.
17.1 TIM6&TIM7 introduction
The basic timers TIM6 and TIM7 consist of a 16-bit auto-reload counter driven by a
programmable prescaler.
They may be used as generic timers for time-base generation but they are also specifically
used to drive the digital-to-analog converter (DAC). In fact, the timers are internally
connected to the DAC and are able to drive it through their trigger outputs.
The timers are completely independent, and do not share any resources.
17.2 TIM6&TIM7 main features
Basic timer (TIM6&TIM7) features include:
● 16-bit auto-reload upcounter
● 16-bit programmable prescaler used to divide (also “on the fly”) the counter clock
frequency by any factor between 1 and 65536
● Synchronization circuit to trigger the DAC
● Interrupt/DMA generation on the update event: counter overflow
Figure 188. Basic timer block diagram
Internal clock (CK_INT)
TIMxCLK from RCC
521/1416 Doc ID 018909 Rev 3
U
Stop, Clear or up
CK_PSC
PSC
Prescaler
CK_CNT
± CNT
COUNTER
interrupt & DMA output
Trigger
controller
Controller
Auto-reload Register
Flag Preload registers transferred
to active registers on U event according to control bit
event
U
TRGO
Reset, Enable, Count,
UI
to DAC
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